I like getting up very early in summer. The morning air is so good _________.
| A．to be breathed | B．to breathe |
| C．breathing | D．being breathed |
Stay ______ in the cave in case the bear might find you.
| A．to hide |
| B．hiding |
| C．hidden |
| D．for hiding |
We sincerely look forward to ______ you as a judge in our English speech contest to be held next Wednesday. Please do contact us if you have any questions.
| A．welcoming |
| B．welcome |
| C．have welcomed |
| D．be welcoming |
As a child,you had no reason to shout at your parents, ______the excuse might haven．
| A．however |
| B．whatever |
| C．whichever |
| D．whenever |
The price of houses in that city has reached an unbelievable level, but six years ago no one could have expected that they ______ so sharply,
| A．rose |
| B．had risen |
| C．were rising |
| D．were to rise |
According to the results of a new study, the act of hearing is a group effort for the human body’s organs, ______the ears, the eyes and also the skin.
| A．to involve |
| B．involved |
| C．involving |
| D．involves |